MODELING AND OPTIMIZATION OF WASTEWATER PURIFICATION IN A COOL THERMAL STORAGE SYSTEM

摘要

A mathematical model considering the heat and mass transfers in a normal freezing cool-thermal storage system using wastewater as the phase change material is developed and solved for the approximate solutions. A convective transport of heat in the water phase and constant heat sinking surface temperature of solid phase were considered and incorporated with the system equations to determine the temperature profiles of solid and liquid layer. The effects of system parameters on the solidification rate and the amount of solute removal are studied. The amount of solute removal is a function of the solidification thickness and the solute distribution coefficient between water and ice. The optimal amount of thermal storage and the optimal solidification thickness have been determined.